FG Scan form validation improvements with warehouse module updates

- Fixed 3 JavaScript syntax errors in fg_scan.html (lines 951, 840-950, 1175-1215)
- Restored form field validation with proper null safety checks
- Re-enabled auto-advance between form fields
- Re-enabled CP code auto-complete with hyphen detection
- Updated validation error messages with clear format specifications and examples
- Added autocomplete='off' to all input fields
- Removed auto-prefix correction feature
- Updated warehouse routes and modules for box assignment workflow
- Added/improved database initialization scripts
- Updated requirements.txt dependencies

Format specifications implemented:
- Operator Code: OP + 2 digits (example: OP01, OP99)
- CP Code: CP + 8 digits + hyphen + 4 digits (example: CP00000000-0001)
- OC1/OC2 Codes: OC + 2 digits (example: OC01, OC99)
- Defect Code: 3 digits only

app/routes.py

@@ -43,8 +43,10 @@ def login():
             session['email'] = user['email']
             session['role'] = user['role']
             session['full_name'] = user['full_name']
+            session.modified = True  # Force session to be saved
             
             logger.info(f"User {username} logged in successfully")
+            logger.debug(f"Session data set: user_id={user['id']}, username={username}")
             flash(f'Welcome, {user["full_name"]}!', 'success')
             
             return redirect(url_for('main.dashboard'))